An integrated structure of flow channel and variable geometry precooler

Abstract

The present invention discloses an integrated structure of a flow channel and a variable geometry precooler, relating to the technical field of heat exchangers. The structure comprises a flow channel base, the flow channel base comprising an annular inner plate assembly and an annular outer plate assembly sleeved outside the annular inner plate assembly; the annular inner plate assembly and the annular outer plate assembly both have inner cavities; an intake flow channel is defined between the outer wall surface of the annular inner plate assembly and the inner wall surface of the annular outer plate assembly; one end of the annular inner plate assembly and / or the annular outer plate assembly along the air intake direction is provided with a cooling medium inlet connected to the corresponding inner cavity, and the other end is provided with a cooling medium outlet connected to the corresponding inner cavity; a heat exchange tube assembly is arranged in the intake flow channel; one end of the heat exchange tube assembly is connected to the inner cavity of the annular inner plate assembly, and the other end is connected to the inner cavity of the annular outer plate assembly, thereby forming an internal cooling medium flow channel connecting the cooling medium inlet and the cooling medium outlet. The present invention can reduce the design size and weight of the engine, making the structure more compact and the heat exchange capacity stronger.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to an integrated structure of a flow channel and a variable geometry precooler. Background Art

[0002] In the field of aerospace technology, reusable, horizontal takeoff and landing hypersonic aircraft hold significant military and civilian value. A wide speed range, high reliability, and high-performance propulsion systems are key factors in achieving these capabilities and are a current research hotspot in the aerospace field. However, in modern advanced turbine engines, the air temperature after deceleration and pressurization in the inlet flow path is excessively high under hypersonic conditions, approaching or even exceeding the allowable temperature of the compressor blades. This results in a very low available compressor pressure ratio, rendering existing propulsion solutions unable to meet the requirements of hypersonic flight.

[0003] A precooled engine is a hypersonic flight propulsion system that extensively utilizes heat exchangers to transfer heat between the air, fuel, and other media within the powertrain. Within a precooled engine, components such as the inlet air cooler and the precombustion chamber heat exchanger require exceptional heat transfer capabilities and operate in harsh environments. The former cools high-temperature incoming air at high Mach numbers, while the latter supplements heat for the working medium in some precooled engine configurations.

[0004] Existing engine heat exchanger designs often separate the heat exchanger from the flow path. Specific designs require adjustments to the flow path to accommodate heat exchanger assembly and space requirements, or to adjust the heat exchanger structure to accommodate flow path limitations. In existing precooled engine designs, the common precooler structures are relatively fixed, and the channels allowing the external heat exchange fluid to flow are also fixed. This often requires corresponding changes to the engine flow path. To meet the precooler structural requirements, the flow path often has sharp bends, resulting in additional total pressure losses and hindering the compactness of the engine structure.

[0005] Therefore, how to design the flow channel and heat exchanger into an integrated structure to reduce the design size and weight of the engine, make the engine structure more compact, and improve the engine performance, while having strong heat exchange capacity and a wide range of applications is an urgent problem that technicians in this field need to solve. Summary of the Invention

[0006] In view of this, the present invention proposes an integrated structure of flow channel and variable geometry precooler, aiming to solve the technical problems of large engine size and weight, non-compact structure and low working efficiency caused by the independent design of engine heat exchanger and flow channel.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides an integrated structure of a flow channel and a variable geometry precooler, comprising:

[0009] A flow channel base, the flow channel base comprising an annular inner plate assembly and an annular outer plate assembly sleeved outside the annular inner plate assembly; the annular inner plate assembly and the annular outer plate assembly both have an inner cavity; an inlet flow channel is defined between the outer wall surface of the annular inner plate assembly and the inner wall surface of the annular outer plate assembly; a cooling medium inlet communicating with the corresponding inner cavity is formed at one end of the annular inner plate assembly and / or the annular outer plate assembly along the air inlet direction of the inlet flow channel, and a cooling medium outlet communicating with the corresponding inner cavity is formed at the other end;

[0010] A heat exchange tube assembly is arranged in the intake air duct to form a heat exchange area in the intake air duct; one end of the heat exchange tube assembly is connected to the inner cavity of the annular inner plate assembly, and the other end is connected to the inner cavity of the annular outer plate assembly to form an internal cooling medium flow channel connecting the cooling medium inlet and the cooling medium outlet.

[0011] Through the above technical solution, it can be known that compared with the prior art, the present invention discloses an integrated structure of a flow channel and a variable geometry precooler, which utilizes an annular inner plate assembly with an inner cavity and an annular outer plate assembly sleeved outside the annular inner plate assembly to construct the engine's intake flow channel. The inner cavity of the annular inner plate assembly and the annular outer plate assembly are used as the design structure of the cooling medium flow channel, which can improve the high temperature resistance of the intake flow channel; the cooling medium flows in from the cooling medium inlet, passes through the annular inner plate assembly, the annular outer plate assembly and the heat exchange tube assembly and flows out from the cooling medium outlet, forming a heat exchange area in the intake flow channel, and the outer wall surface of the annular inner plate assembly, the inner wall surface of the annular outer plate assembly and the outer wall surface of the heat exchange tube assembly are all heat exchange wall surfaces, achieving the effect of increasing the heat exchange area and improving the heat exchange efficiency, thereby expanding the engine's operating speed range. The present invention can greatly reduce the design size and weight of the engine by integrating the engine heat exchanger with the flow channel, making the structure more compact and further improving the engine's operating efficiency.

[0012] As a further improvement of the above technical solution, the annular inner plate assembly includes a plurality of annular base plates 1 with inner cavities, the annular outer plate assembly includes a plurality of annular base plates 2 with inner cavities; the heat exchange tube assembly includes a plurality of groups of heat exchange tubes;

[0013] The plurality of annular substrates 1 are arranged sequentially along the axial direction thereof, and the opposite side walls of any two adjacent annular substrates 1 are fixedly connected and sealed; the plurality of annular substrates 2 are arranged sequentially along the axial direction thereof, and the opposite side walls of any two adjacent annular substrates 2 are fixedly connected and sealed; the inlet flow channel is defined between the outer wall surfaces of the plurality of annular substrates 1 and the inner wall surfaces of the plurality of annular substrates 2;

[0014] Any one of the annular substrates 2 is arranged corresponding to the middle part of the two adjacent annular substrates 1, and the inner cavity of any one of the annular substrates 2 is connected to the inner cavity of the corresponding two adjacent annular substrates 1 through the heat exchange tube;

[0015] The cooling medium inlet and the cooling medium outlet are respectively arranged on the annular substrate 1 and / or the annular substrate 2 corresponding to two ends of the intake air channel.

[0016] The beneficial effects of the above technical solution are: the annular inner plate assembly is composed of multiple annular base plates connected in sequence along the axial direction, and the annular outer plate assembly is composed of multiple annular base plates connected in sequence along the axial direction. By adjusting the structure and size of the annular base plates 1 and the annular base plates 2, the intake flow duct structure of the engine can be flexibly designed; and the corresponding inner cavity of the annular base plate 1 and the inner cavity of the annular base plate 2 are connected by a heat exchange pipe to construct a continuous internal cooling medium flow channel, thereby realizing the integrated design of the heat exchange structure and the intake flow duct structure, greatly reducing the design size of the engine and optimizing the engine structure.

[0017] The cooling medium inlet and the cooling medium outlet are respectively arranged on the annular substrate 1 and / or the annular substrate 2 at both ends of the corresponding inlet flow channel, which can realize the unidirectional orderly flow of the cooling medium in the cooling medium flow channel.

[0018] As a further improvement of the above technical solution, each group of heat exchange tubes is divided into multiple rows, and each row contains multiple heat exchange tubes; the multiple rows of heat exchange tubes are arranged at intervals along the two axial directions of the annular substrate; and the heat exchange tubes in each row are evenly arranged along the two circumferential directions of the annular substrate.

[0019] The beneficial effect of the above technical solution is that the multiple heat exchange tubes are evenly distributed in the inlet flow channel, thereby improving the uniformity of heat exchange of the medium in the heat exchange area.

[0020] As a further improvement of the above technical solution, the heat exchange tube is a linear structure or a spiral structure.

[0021] The beneficial effect of the above technical solution is that the heat exchange area in the heat exchange zone can be changed by adjusting the shape of the heat exchange tube to meet the heat exchange requirements of different engines.

[0022] As a further improvement of the above technical solution, the cross-section of the heat exchange tube in the vertical length direction is any one of a circle, an ellipse and a polygon.

[0023] The beneficial effect of the above technical solution is that the heat exchange area in the heat exchange zone can be changed by adjusting the cross-sectional shape of the heat exchange tube, thereby further meeting the heat exchange requirements of different engines.

[0024] As a further improvement to the above technical solution, the annular outer plate assembly further includes a plurality of annular base plates three having inner cavities, wherein the plurality of annular base plates three are arranged in the inlet flow passage and sleeved on the outside of the annular base plate one; the plurality of annular base plates three are arranged sequentially along their axial direction and correspond one to one to the plurality of groups of heat exchange tubes, and the opposite side walls of any two adjacent annular base plates three are fixedly connected and sealed; each group of heat exchange tubes passes through the corresponding annular base plate three and is in communication with the inner cavity of the corresponding annular base plate three;

[0025] The plurality of annular substrates three divide the intake air channel into an intake air channel one and an intake air channel two along a direction perpendicular to the intake direction.

[0026] The beneficial effect of the above technical solution is that the annular substrate three arranged between the annular substrate one and the annular substrate two divides the intake air duct into the intake air duct one and the intake air duct two. The intake air duct one and the intake air duct two play a restraining and guiding role on the fluid entering the engine intake duct, which can increase the intake airflow stability of the engine intake duct.

[0027] As a further improvement of the above technical solution, the contour line of the inner wall surface of the intake air duct along the intake direction is a straight line or a curve.

[0028] The beneficial effect of the above technical solution is that the inner wall contour structure of the intake flow channel constructed by annular substrate one and annular substrate two can be flexibly adjusted according to the needs of the engine structure without affecting the layout of the heat exchange structure. That is, the integrated flow channel structure design and the heat exchanger structure design do not interfere with each other, which makes it easier to realize the integrated design of the flow channel and the heat exchanger, thereby reducing the design cost.

[0029] As a further improvement of the above technical solution, the plurality of annular substrates 1, the plurality of annular substrates 2, and the plurality of annular substrates 3 are all of the same shape and are coaxially arranged.

[0030] The beneficial effect of the above technical solution is that multiple annular substrates 1, multiple annular substrates 2 and multiple annular substrates 3 are all of the same shape and are coaxially arranged, which is convenient for constructing an engine flow channel and heat exchange structure with a symmetrical structure, and is also conducive to achieving structural unification of the heat exchange tube, thereby reducing manufacturing difficulty.

[0031] As a further improvement of the above technical solution, a plurality of the annular substrates are combined to form a cylindrical or truncated cone shape; a plurality of the annular substrates are combined to form a cylindrical or truncated cone shape; a plurality of the annular substrates are combined to form a cylindrical or truncated cone shape.

[0032] As a further improvement of the above technical solution, the cooling medium inlet and the cooling medium outlet are respectively arranged on the annular hole wall of the annular substrate corresponding to the two ends of the intake air flow channel; the cooling medium inlet and the cooling medium outlet are both multiple, and the multiple cooling medium inlets and the multiple cooling medium outlets are evenly distributed along the circumference of the corresponding annular substrate.

[0033] The beneficial effects of the above technical solution are: the cooling medium inlet and the cooling medium outlet are respectively arranged on the annular hole wall of the annular substrate, which will not interfere with the arrangement of the heat exchange tube and will not affect the structure of the intake air flow channel; multiple cooling medium inlets and multiple cooling medium outlets are evenly distributed along the circumference of the corresponding annular substrate, thereby improving the uniformity of cooling medium transportation in the cooling medium flow channel.

[0034] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides an integrated structure of a flow channel and a variable geometry precooler, which has the following advantages and beneficial effects:

[0035] 1. The present invention provides an integrated structure of flow channel and variable geometry precooler, which has the advantages of compact structure, light weight, strong heat exchange capacity and wide application range.

[0036] 2. The present invention provides an integrated structure of a flow channel and a variable geometry precooler. By rationally designing the shapes of the annular inner plate assembly and the annular outer plate assembly, a flow channel of any shape can be formed between the annular inner plate assembly and the annular outer plate assembly; by adjusting the size, shape and arrangement of the heat exchange tubes between the annular inner plate assembly and the annular outer plate assembly, any flow area and heat exchange area can be formed in the heat exchange zone in the inlet flow channel; due to the presence of flowing cooling medium in the inner cavity of the annular inner plate assembly and the annular outer plate assembly, the wall surfaces of the annular inner plate assembly and the annular outer plate assembly have higher high-temperature resistance; the invention can be widely used in the design of heat exchangers in aerospace and various environments requiring superb heat exchange capabilities and harsh working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0038] Figure 1 A three-dimensional schematic diagram of a form of an integrated structure of a flow channel and a variable geometry precooler according to the present invention.

[0039] Figure 2 The present invention Figure 1 A magnified schematic diagram of the structure in the middle.

[0040] Figure 3 The present invention Figure 1 A magnified schematic diagram of the structure at point A in the middle from another perspective.

[0041] Figure 4 A schematic diagram of a linear heat exchange tube structure with an integrated flow channel and a variable geometry precooler according to the present invention.

[0042] Figure 5 Schematic diagram of the spiral heat exchange tube structure with integrated flow channel and variable geometry precooler of the present invention.

[0043] Figure 6 A schematic structural diagram from another perspective of a spiral heat exchange tube with an integrated structure of a flow channel and a variable geometry precooler according to the present invention.

[0044] Figure 7 A three-dimensional schematic diagram of another form of the integrated structure of the flow channel and the variable geometry precooler of the present invention.

[0045] Figure 8 A schematic front view of another form of an integrated structure of a flow channel and a variable geometry precooler according to the present invention.

[0046] Figure 9 A schematic diagram of the intake heat exchange process of an intake air flow channel with an integrated structure of a flow channel and a variable geometry precooler according to the present invention.

[0047] Figure 10 Schematic diagram of the intake heat exchange process of another intake flow channel of the integrated structure of the flow channel and the variable geometry precooler of the present invention.

[0048] Figure 11 A schematic diagram of the intake air heat exchange process in an intake air flow channel of an integrated structure of a flow channel and a variable geometry precooler having a ring-shaped base plate three according to the present invention;

[0049] Figure 12 A schematic diagram of the arrangement of heat exchange tubes on an annular inner plate assembly in an integrated structure of a flow channel and a variable geometry precooler according to the present invention;

[0050] Description of reference numerals:

[0051] 1. Flow channel base; 11. Annular inner plate assembly; 111. Annular base plate one; 1111. Cooling medium inlet; 1112. Cooling medium outlet; 12. Annular outer plate assembly; 121. Annular base plate two; 1211. Inlet flow channel; 1211a. Inlet flow channel one; 1211b. Inlet flow channel two; 122. Annular base plate three; 2. Heat exchange tube assembly; 21. Heat exchange tube. DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0053] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0055] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0056] like Figures 1 to 12 As shown, a flow channel and variable geometry precooler integrated structure includes:

[0057] The flow channel base 1 includes an annular inner plate assembly 11 and an annular outer plate assembly 12 sleeved outside the annular inner plate assembly 11; the annular inner plate assembly 11 and the annular outer plate assembly 12 each have an inner cavity; the outer wall surface of the annular inner plate assembly 11 and the inner wall surface of the annular outer plate assembly 12 define an engine intake flow channel 1211; the annular inner plate assembly 11 and / or the annular outer plate assembly 12 have a cooling medium inlet 1111 at one end thereof along the intake direction of the intake flow channel 1211, communicating with the corresponding inner cavity, and a cooling medium outlet 1112 at the other end thereof;

[0058] The heat exchange tube assembly 2 is arranged in the intake flow channel 1211 to form a heat exchange area in the intake flow channel 1211; one end of the heat exchange tube assembly 2 is connected to the inner cavity of the annular inner plate assembly 11, and the other end is connected to the inner cavity of the annular outer plate assembly 12 to form an internal cooling medium flow channel connecting the cooling medium inlet 1111 and the cooling medium outlet 1112.

[0059] The present embodiment provides an integrated structure of a flow channel and a variable geometry precooler, which utilizes an annular inner plate assembly 11 with an inner cavity and an annular outer plate assembly 12 sleeved outside the annular inner plate assembly 11 to construct an engine intake flow channel 1211, and uses the inner cavities of the annular inner plate assembly 11 and the annular outer plate assembly 12 as a design structure for the cooling medium flow channel, which can improve the high temperature resistance of the intake flow channel 1211; the cooling medium flows in from the cooling medium inlet 1111, passes through the inner cavity of the annular inner plate assembly 11, the inner cavity of the annular outer plate assembly 12 and the heat exchange tube assembly 2, and flows out from the cooling medium outlet 1112, forming a heat exchange area in the intake flow channel 1211, and the outer wall surface of the annular inner plate assembly 11, the inner wall surface of the annular outer plate assembly 12 and the outer wall surface of the heat exchange tube assembly 2 are all heat exchange wall surfaces, thereby achieving the effect of increasing the heat exchange area and improving the heat exchange efficiency, thereby expanding the working speed range of the engine. This embodiment integrates the engine heat exchanger and the flow channel into an integrated design, which can greatly reduce the design size and weight of the engine, make the structure more compact, and further improve the working efficiency of the engine.

[0060] In some embodiments, the annular inner plate assembly 11 includes a plurality of annular base plates 111 having inner cavities, and the annular outer plate assembly 12 includes a plurality of annular base plates 121 having inner cavities; the heat exchange tube assembly 2 includes a plurality of heat exchange tubes 21;

[0061] The plurality of annular substrates 111 are sequentially arranged along the axial direction thereof, and the opposing side walls of any two adjacent annular substrates 111 are fixedly connected and sealed. The plurality of annular substrates 121 are sequentially arranged along the axial direction thereof, and the opposing side walls of any two adjacent annular substrates 121 are fixedly connected and sealed. The outer walls of the plurality of annular substrates 111 and the inner walls of the plurality of annular substrates 121 define an intake air passage 1211 of the engine.

[0062] Any one of the second annular substrates 121 is arranged corresponding to the middle of two adjacent one annular substrates 111, and the inner cavity of any one of the second annular substrates 121 is connected to the inner cavity of the corresponding two adjacent one annular substrates 111 through the heat exchange pipe 21;

[0063] The cooling medium inlet 1111 and the cooling medium outlet 1112 are respectively arranged on the annular substrate 111 and / or the annular substrate 2 121 at two ends of the corresponding inlet flow channel 1211 .

[0064] The annular inner plate assembly 11 is composed of a plurality of annular base plates 111 connected in sequence along the axial direction thereof, and the annular outer plate assembly 12 is composed of a plurality of annular base plates 121 connected in sequence along the axial direction thereof. By adjusting the structure and size of the annular base plates 111 and the annular base plates 121, the structure of the engine's intake air duct 1211 can be flexibly designed; and the heat exchange tube 21 is used to connect the corresponding inner cavities of the annular base plates 111 and the inner cavities of the annular base plates 2 121 to construct a continuous internal cooling medium flow channel, thereby realizing the integrated design of the heat exchange structure and the intake air duct structure, greatly reducing the design size of the engine and optimizing the engine structure.

[0065] The cooling medium inlet 1111 and the cooling medium outlet 1112 are respectively arranged on the annular substrate 111 and / or the annular substrate 2 121 at both ends of the corresponding inlet flow channel 1211, so as to realize the unidirectional orderly flow of the cooling medium in the cooling medium flow channel.

[0066] In some embodiments, each group of heat exchange tubes 21 is divided into multiple rows, and each row of heat exchange tubes 21 contains multiple heat exchange tubes 21; the multiple rows of heat exchange tubes 21 are arranged axially opposite and at intervals along the second annular base plate 121; and each row of heat exchange tubes 21 are evenly arranged circumferentially along the second annular base plate 121.

[0067] The plurality of heat exchange tubes 21 are evenly distributed in the inlet flow channel 1211 , thereby improving the uniformity of heat exchange of the medium in the heat exchange area.

[0068] In some embodiments, the heat exchange tube 21 is a linear structure or a spiral structure.

[0069] The heat exchange area in the heat exchange zone can be changed by adjusting the shape of the heat exchange tube 21 to meet the heat exchange requirements of different engines.

[0070] Specifically, the structure of the heat exchange tube 21 used in the present invention is not limited to a straight round tube. Figure 5 and Figure 6 In the figure, the spiral line of the heat exchange tube 21 has a starting radius of 200mm and an ending radius of 500mm, with a spiral angle of 180°. The spiral tube cross-section is a circular tube with an outer diameter of 4mm and a wall thickness of 0.4mm. A total of 16 heat exchange tubes 21 are arranged between the two curved base plates. By varying the structure and arrangement of the heat exchange tubes 21, any heat exchange area can be varied.

[0071] In some embodiments, the cross-section of the heat exchange tube 21 in the vertical length direction is any one of a circle, an ellipse and a polygon.

[0072] The heat exchange area in the heat exchange zone can be changed by adjusting the cross-sectional shape of the heat exchange tube 21, thereby further meeting the heat exchange requirements of different engines.

[0073] In some embodiments, the annular outer plate assembly 12 further includes a plurality of annular base plates 122 having inner cavities. The plurality of annular base plates 122 are arranged in the inlet airflow channel 1211 and sleeved on the outside of the annular base plate 111. The plurality of annular base plates 122 are sequentially arranged along their axial direction and correspond one to one to the plurality of groups of heat exchange tubes 21. The opposing side walls of any two adjacent annular base plates 122 are fixedly connected and sealed. Each group of heat exchange tubes 21 passes through the corresponding annular base plate 122 and communicates with the inner cavity of the corresponding annular base plate 122.

[0074] The plurality of annular substrates 122 divide the intake channel 1211 into an intake channel 1 1211 a and an intake channel 2 1211 b along a direction perpendicular to the intake direction.

[0075] The annular substrate three 122 arranged between the annular substrate one 111 and the annular substrate two 121 divides the intake air duct 1211 into the intake air duct one 1211a and the intake air duct two 1211b. The intake air duct one 1211a and the intake air duct two 1211b have a restraining and guiding effect on the fluid entering the engine intake duct, thereby increasing the intake airflow stability of the engine intake duct.

[0076] Specifically, adjacent annular substrates 111, adjacent annular substrates 2 121, and adjacent annular substrates 3 122 can be connected in the circumferential and axial directions according to the target flow channel requirements (for example, in the form of welding or bolting), and can form flow channels of any shape and heat exchange areas that meet the requirements; the structures of the annular inner plate assembly 11 and the annular outer plate assembly 12 and the shapes of the heat exchange tubes can be adjusted and combined.

[0077] In some embodiments, the annular substrate 111 , the annular substrate 2 121 , and the annular substrate 3 122 are all hollow shell structures or annular tubes, so that their inner cavities are all annular tube cavities.

[0078] In some embodiments, the annular substrate 111, the annular substrate 2 121, and the annular substrate 3 122 are all composed of a plurality of arc-shaped substrates, and each arc-shaped substrate is a hollow shell structure with an arc-shaped inner cavity. Figures 2 to 4 The structure of two curved substrates connected by heat exchange tubes 21 is shown. The curved substrates and heat exchange tubes 21 can be connected by welding. Adjacent curved substrates can be processed as a whole, and the connection method between the components is not limited.

[0079] The annular substrate 111 , the annular substrate 2 121 and the annular substrate 3 122 formed by splicing multiple arc-shaped substrates can make the internal heat exchange fluid (such as cooling medium) move in a better directional manner along the direction of the inlet flow channel in the internal cooling medium flow channel.

[0080] Specifically, the annular base plate 111 has an annular hole diameter of 400 mm, a radial thickness of 10 mm, an axial length of 30 mm, and a rectangular cross-section. The wall thickness of the annular base plate 111 is 1 mm. The annular hole diameter of the second annular base plate 121 is 800 mm, and all other parameters are identical to those of the first annular base plate 111. When the heat exchange tube is a circular tube, its outer diameter is 4 mm, its wall thickness is 0.4 mm, and its length is 380 mm. Of course, the dimensions, angles, wall thicknesses, and other parameters of the first annular base plate 111, the second annular base plate 121, and the heat exchange tube 21 are not limited to these and can be adjusted according to actual design requirements.

[0081] Specifically, Figure 12 The arrangement of the heat exchange tubes 21 on the annular substrate 111 is given in FIG. Figure 12 (a) is the sequential arrangement. Figure 12 (b) is a staggered arrangement. The arrangement of the heat exchange tubes 21 on the second annular base plate 121 and the third annular base plate 122 is the same as that on the first annular base plate 111.

[0082] For details, see Figures 2 to 4 Thirty heat exchange tubes 21 are staggered on a curved substrate. Fifteen of these tubes have their ends directly connected to two opposing curved substrates, while another 15 have one end connected to one curved substrate and the other end connected to other curved substrates. This connection method enables continuous flow of internal heat exchange fluid (e.g., cooling medium) between multiple curved substrates. The arrangement of the heat exchange tubes 21 and the connection between the curved substrates and the heat exchange tubes 21 can be adjusted according to actual needs, as long as the internal heat exchange fluid can flow from one curved substrate through the heat exchange tubes 21 to the next curved substrate.

[0083] Specifically, within the concentric cylindrical intake channel 1211 with an inner diameter of 420 mm, an outer diameter of 800 mm, and a length of 720 mm, a speed of 264.6 m can be achieved. 2 The heat exchange area shows a high compactness. At the same time, according to the shape and arrangement of the heat exchange tubes 21, an even higher compactness can be achieved.

[0084] Specifically, when the heat exchange tube 21 is circular or elliptical, its diameter or major and minor axes are 0.1 mm to 10 mm.

[0085] In some embodiments, the contour line of the inner wall surface of the intake air channel 1211 along the intake direction is a straight line or a curve.

[0086] The inner wall contour structure of the intake flow channel 1211 constructed by the annular substrate 111 and the annular substrate 2 121 can be flexibly adjusted according to the requirements of the engine structure without affecting the layout of the heat exchange structure. That is, the integrated flow channel structure design and the heat exchanger structure design do not interfere with each other, which makes it easier to realize the integrated design of the flow channel and the heat exchanger and reduces the design cost.

[0087] In some embodiments, the plurality of first annular substrates 111 , the plurality of second annular substrates 121 , and the plurality of third annular substrates 122 all have the same shape and are coaxially arranged.

[0088] Multiple annular substrates 111, multiple annular substrates 2 121 and multiple annular substrates 3 122 are all of the same shape and are coaxially arranged, which facilitates the construction of an engine flow channel and heat exchange structure with a symmetrical structure, and is also conducive to achieving structural unification of the heat exchange tube 21, thereby reducing manufacturing difficulty.

[0089] In some embodiments, a plurality of annular substrates 111 are combined to form a cylindrical or truncated cone shape; a plurality of annular substrates 121 are combined to form a cylindrical or truncated cone shape; a plurality of annular substrates 122 are combined to form a cylindrical or truncated cone shape.

[0090] Specifically, such as Figure 1 As shown, a plurality of annular substrates 111 and a plurality of annular substrates 121 are provided, all of which are circular ring structures and are combined to form a coaxially arranged cylindrical structure. Figure 7 and Figure 8 As shown, a structure is shown in which an annular substrate 111, an annular substrate 121, and an annular substrate 122 are coaxially arranged and spaced apart along the axial direction. Multiple annular substrates 111, 121, and 122 are combined to form a truncated cone-shaped structure. Of course, the number and arrangement of the curved substrates required to form the intake air duct, as well as the resulting flow channel structure, are not limited to this and can be adjusted according to actual design requirements.

[0091] In some embodiments, the cooling medium inlet 1111 and the cooling medium outlet 1112 are respectively arranged on the annular hole walls of the annular substrate 111 at both ends of the corresponding inlet flow channel 1211; there are multiple cooling medium inlets 1111 and multiple cooling medium outlets 1112, and the multiple cooling medium inlets 1111 and the multiple cooling medium outlets 1112 are evenly distributed along the circumference of the corresponding annular substrate 111.

[0092] The cooling medium inlet 1111 and the cooling medium outlet 1112 are respectively opened on the annular hole wall of the annular substrate 111, which will not interfere with the arrangement of the heat exchange tube 21 and will not affect the structure of the inlet flow channel 1211; multiple cooling medium inlets 1111 and multiple cooling medium outlets 1112 are evenly distributed along the circumference of the corresponding annular substrate 111, thereby improving the uniformity of cooling medium transportation in the cooling medium flow channel.

[0093] Figures 9 to 11 The heat transfer process in the intake air duct is shown in the figure. 丿 The figure represents the axis of annular substrate 111. The outer heat exchange fluid (air) enters the heat exchange zone within the heat exchange channel at W1 and leaves the heat exchange zone at W2, completing heat exchange with the inner heat exchange fluid (cooling medium). The inner heat exchange fluid (cooling medium) enters the internal cooling medium channel (which includes the heat exchange tube 21 and the inner cavities of annular substrates 111, 121, and 122) through cooling medium inlet 1111 at nozzle N1, passes through cooling medium outlet 1112, and is discharged at nozzle N2. The curved arrows in the figure indicate the flow path of the cooling medium within the internal cooling medium channel. The integrated flow channel and heat exchanger structure of the present invention enables the cooling medium to flow in a zigzag pattern within the cooling medium channel, extending the cooling medium flow path and improving heat exchange efficiency.

[0094] Specifically, the outer heat exchange fluid flows along the inlet flow passage in a direction opposite to that of the inner heat exchange fluid, thereby further increasing the heat exchange efficiency of the entire structure.

[0095] It should be noted that the geometric shape of the precooler of the present invention can be flexibly changed and designed, and the heat exchange tubes can also be flexibly arranged. It has the characteristics of variable geometry and can adapt to the diversification and compactness requirements of the engine intake flow channel structure design.

[0096] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0097] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flow channel and variable geometry precooler integrated structure, characterized in that: include: A flow channel base (1), the flow channel base (1) comprising an annular inner plate assembly (11) and an annular outer plate assembly (12) sleeved outside the annular inner plate assembly (11); the annular inner plate assembly (11) and the annular outer plate assembly (12) both have inner cavities; an inlet flow channel (1211) is defined between the outer wall surface of the annular inner plate assembly (11) and the inner wall surface of the annular outer plate assembly (12); a cooling medium inlet (1111) communicating with the corresponding inner cavity is provided at one end of the annular inner plate assembly (11) and / or the annular outer plate assembly (12) along the air inlet direction of the inlet flow channel (1211), and a cooling medium outlet (1112) communicating with the corresponding inner cavity is provided at the other end; a heat exchange tube assembly (2), the heat exchange tube assembly (2) being arranged in the intake air duct (1211) to form a heat exchange zone in the intake air duct (1211); one end of the heat exchange tube assembly (2) being connected to the inner cavity of the annular inner plate assembly (11), and the other end being connected to the inner cavity of the annular outer plate assembly (12), to form an internal cooling medium flow channel connecting the cooling medium inlet (1111) and the cooling medium outlet (1112); The annular inner plate assembly (11) includes a plurality of annular base plates (111) each having an inner cavity, and the annular outer plate assembly (12) includes a plurality of annular base plates (121) each having an inner cavity; the heat exchange tube assembly (2) includes a plurality of groups of heat exchange tubes (21); The plurality of annular substrates (111) are sequentially arranged along the axial direction thereof, and the opposite side walls of any two adjacent annular substrates (111) are fixedly connected and sealed; the plurality of annular substrates (121) are sequentially arranged along the axial direction thereof, and the opposite side walls of any two adjacent annular substrates (121) are fixedly connected and sealed; the intake air flow channel (1211) is defined between the outer wall surfaces of the plurality of annular substrates (111) and the inner wall surfaces of the plurality of annular substrates (121); Any one of the annular substrates 2 (121) is arranged corresponding to the middle of the two adjacent annular substrates 1 (111), and the inner cavity of any one of the annular substrates 2 (121) is connected to the inner cavity of the corresponding two adjacent annular substrates 1 (111) through the heat exchange pipe (21); The cooling medium inlet (1111) and the cooling medium outlet (1112) are respectively arranged on the annular substrate one (111) and / or the annular substrate two (121) corresponding to the two ends of the inlet flow channel (1211).

2. The integrated structure of flow channel and variable geometry precooler according to claim 1, characterized in that: Each group of heat exchange tubes (21) is divided into multiple rows, and each row of heat exchange tubes (21) contains multiple heat exchange tubes (21); the multiple rows of heat exchange tubes (21) are arranged at intervals along the axial direction of the second annular base plate (121); and the heat exchange tubes (21) in each row are evenly arranged along the circumference of the second annular base plate (121).

3. The integrated structure of flow channel and variable geometry precooler according to claim 2, characterized in that: The heat exchange tube (21) is a linear structure or a spiral structure.

4. The integrated structure of flow channel and variable geometry precooler according to claim 3, characterized in that: The cross section of the heat exchange tube (21) in the vertical length direction is any one of a circle, an ellipse and a polygon.

5. The integrated structure of flow channel and variable geometry precooler according to claim 1, characterized in that: The annular outer plate assembly (12) further comprises a plurality of annular base plates (122) having inner cavities, wherein the plurality of annular base plates (122) are arranged in the inlet air flow channel (1211) and are sleeved on the outside of the annular base plate (111); the plurality of annular base plates (122) are sequentially arranged along their axial direction and correspond one to one to a plurality of groups of the heat exchange tubes (21), and the opposite side walls of any two adjacent annular base plates (122) are fixedly connected and sealed; each group of the heat exchange tubes (21) passes through the corresponding annular base plate (122) and is in communication with the inner cavity of the corresponding annular base plate (122); The plurality of annular substrates three (122) divide the intake channel (1211) into intake channel one (1211a) and intake channel two (1211b) along a direction perpendicular to the intake direction.

6. The integrated structure of flow channel and variable geometry precooler according to claim 5, characterized in that: The contour line of the inner wall surface of the intake air channel (1211) along the air intake direction is a straight line or a curve.

7. The integrated structure of flow channel and variable geometry precooler according to claim 6, characterized in that: The plurality of annular substrates one (111), the plurality of annular substrates two (121) and the plurality of annular substrates three (122) are all of the same shape and are coaxially arranged.

8. The integrated structure of flow channel and variable geometry precooler according to claim 7, characterized in that: A plurality of the annular substrates (111) are combined to form a cylindrical or truncated cone shape; a plurality of the annular substrates (121) are combined to form a cylindrical or truncated cone shape; a plurality of the annular substrates (122) are combined to form a cylindrical or truncated cone shape.

9. The integrated structure of flow channel and variable geometry precooler according to claim 1, characterized in that: The cooling medium inlet (1111) and the cooling medium outlet (1112) are respectively arranged on the annular hole wall of the annular substrate (111) corresponding to the two ends of the inlet flow channel (1211); the cooling medium inlet (1111) and the cooling medium outlet (1112) are both multiple, and the multiple cooling medium inlets (1111) and the multiple cooling medium outlets (1112) are uniformly distributed along the circumference of the corresponding annular substrate (111).

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